Abstract

We report the operation of an all-solid-state system for the generation
of tunable mid-infrared sub-50-fs pulses. A Ti:sapphire regenerative
amplifier, pumped by 10 W of power from 532-nm, diode-pumped,
frequency-doubled Nd:YVO4 lasers, produced 4‐µJ energy, sub-50-fs pulses at 800 nm with a 100-kHz
repetition rate. This output was used to drive a β‐BaB2O4 optical parametric amplifier followed by a difference-frequency
generator based on a AgGaS2 crystal. Continuous tuning of ultrafast pulses from 2.4µm to longer than 12µm was obtained. A performance comparison of difference-frequency
generation in type I and type II phase-matched AgGaS2 is reported.

References

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